The productions stages were tiered and the further processed ore would descend from the one to the next. You can see here how the works followed the shape of the hill to its benefit, with each tier gradually finding its way down through the process until the material was ready for production and stored here in storage bins. You can also spot a small child in this photo, who seemed intent on ruining my photographs and screaming loudly at her family down below. I bet the workers didn't have to endure annoying children. At this point I envied them for that very reason. Anyway, moving on..